Energy harvesting from piezoelectric material - a part of nanotechnology

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  • 1. G.H.RAISONI COLLEGE OF ENGINEERING (AN AUTONOMOUS INSTITUTION UNDER UGC ACT 1956) A REVIEW ON “Energy Harvesting From Piezoelectric Material” [A part of nanotechnology] TEACHER ASSESSMENT EXAM-4 NAME : YASH SAWARKAR (82) : KUNAL KAWALE (83) SECTION:A BRANCH: INFORMATION TECHNOLOGY
  • 2. INDEX 1. Abstract……………………………………………………………….1 2. Introduction ………………………………………………………..1 3. Methodology under vibration load………………………2 4. Technique ……………………………………………………………3 5. Conclusion…………………………………………………………..4
  • 3. 1.ABSTRACT In the last few years, there has been an increasing demand for low-power and portable-energy sources due to the development and mass consumption of portable electronic devices. Furthermore, the portable-energy sources must be associated with environmental issues and imposed regulations. These demands support research in the areas of portable-energy generation methods. In this scope, piezoelectric materials become a strong candidate for energy generation and storage in future applications. In this report we will discuss the energy generation using nano technology by means of piezoelectric material An electrostatic generator was also included in order to increase energy harvesting. In this energy harvesting system, the mechanical energy is converted to the electric energy through the piezoelectric effect of the polyurea film on the device 2.INTRODUCTION The electric power generation using the piezoelectric element is one of the techniques utilizing the piezoelectric effect. The wasted energy in the natural phenomenon, e.g., wind and tidal energy, and the generated vibration on the structure such as a bridge, can be reutilized by this energy harvesting technique. Several groups have been investigating the energy harvesting techniques using the piezoelectric material PZT ceramics are suitable for the energy harvesting system since the conversion efficiency from the mechanical to the electrical energy is governed by the piezoelectric constants d and g and the PZT ceramics have high piezoelectric constants and quality factor In this report we propose the energy harvesting device with a polyurea thin film. Polyurea is one of the piezoelectric polymer materials, which is expected as lead-free piezoelectric material and has rich flexibility and high impact resistance. The polyurea thin film can be formed through the vapor deposition polymerization with MDI and ODA. Unlike polyvinylidene fluoride (PVDF) film which needs the stretching in the wet process, the polyurea film can be formed in the dry process and the multi-layered and thin film can be currently formed, and the piezoelectric g constant of the polyurea is larger than that of the PVDF
  • 4. 3.METHODOLOGY UNDER VIBRATION LOAD shows a schematic of the power-generationexperiment under a vibration load. This experimental device consists of a connection device that transforms the vibration load of the vibration table and a device that holds the laminated PZT test pieces in place. The vibration load of the vibration table is transmitted to the laminate PZT In the device holding the PZT elements, the compressionload to the initial compression adjustment device is applied from the left, and is given as an initial compressive load to the laminated PZT test piece sandwiched between the adapters through the rubber block. The purpose of the initial compression load is to ensure that the load acting on the laminated PZT elements maintains a compressive load at all times. The load acting on the PZT elements is measured by a load cell.
  • 5. 4. TECHNIQUE Conversion of Vibration in Shoes Wearing into Electricity Piezoelectric materials are materials (usually in the form of rock crystal, ceramics ,including bone and polymers) that have the ability to generate an electric potential inresponse to mechanical stress given into material. The mechanism process of energy generation in the piezoelectric material is when there is pressure / mechanical energy of the piezoelectric material, it causes deformation / mechanical shift, then it causes a shift in the charge / dipoles. When the pressure / mechanical energy is removed, the charge will return to normal. The process of pressure granting and removing on the piezoelectric material are repeated / periodic charge will cause a shift causing alternating electric current. Electrical energy generation scheme on the piezoelectric material can be seen in figure above. Mechanical electrical energy generation piezoelectric materials (Peter Woas, 2012) Generating electricity by using piezoelectric materials has three main stages: 1. Piezoelectric sensors as electrical energy generation module, which performs the conversion of vibrational energy into electrical energy 2. Rectifier Module as part of the conversion to electrical energy into DC power supply 3. Functioning amplifier module comprising a voltage amplifier and voltage regulator. Output voltage generated can be used as a source of electrical energy or can be stored in the battery
  • 6. 5.CONCLUSION From the several methods available to integrate energygenerating elements harvesting human energy, piezoelectric materials associated with electrostatic generators seem to be one of the most promising elements. In particular, electroactive polymers are particularly interesting due to their low cost, flexibility, and easy integration into elements such as clothes and shoes. In this paper, electroactive polymers based on β-PVDF